diff -ur libxcb-1.12-orig/configure libxcb-1.12/configure
--- libxcb-1.12-orig/configure	2017-07-29 22:28:37.986987240 -0700
+++ libxcb-1.12/configure	2017-07-29 22:51:26.410210675 -0700
@@ -19666,7 +19666,7 @@
 $as_echo "yes" >&6; }
 
 fi
-NEEDED="pthread-stubs xau >= 0.99.2"
+NEEDED="xau >= 0.99.2"
 
 pkg_failed=no
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NEEDED" >&5